Shearing and punching machine.



l PATENTBD JAN. 3, 1965.

C. WUNDERLIGH. SHEARING AND PUNCHING MACHINE.

APLICATION FILED FEB. 23, 1904.

No. t 79,387.

UNITED STATES Patented January 3, 1905.

CARL VUNDERLICH, OF SCHIRNDING, GERMANY.

SHEARING AND PUNCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 779,387, dated January 3, 1905.

Application filed February Z3, 1904-.. Serial No. 194,792.

To all whom it may concern:

Be it known that I, CARL VVUNDERLICH, a subject of the German Emperor-,residing at Schirnding, Upper Franconia, in the German Empire, have invented new and useful Improvements in Shearing and Punching Machines, of which the following is a specification.

My invention relates to a beam shearing and punching machine designed to consume less power than other machines of this class. In contradistinction to prior shearing and punching machines worked by direct eccentric-pressure rigid connections are avoided, whereby fractures and other defects on breakdown are obviated.

To secure the objects in view, I employ elastic members to connect one end of the beam with the eccentric on the main shaft-that is to say, to hold the pressing-surface of the eccentric against av roller mounted in the one beam end,.and like elastic members to hold the other beam end against the shear-slide or punch-piston, a spring-controlled dog or block being, moreover, inserted between the beam end and the semispherical pressing-block of the slide or piston. as fracture of the shears, jamming of parts, &c.-occurring the resistance offered to further up-and-down motion of the beam is without effect on the holding means of the slide or piston, owing to the resilience of the said elastic members and to the dog being brought out of action by its spring.

My invention is shown in the accompanying drawings, in which- Figure l shows an elevation of the top portion of ashearing-machine, a part of the shearslide being broken away to display underlying parts. Fig. Pisa sectional View illustrating the application of a punching device to the machine. Fig. 2 is a vertical section illustrating, on a larger scale, the method of connect-Y ing the beam 'and the shear-slide. Fig. 3 is an elevation, partly in section, showing, on a larger scale, the dog mechanism and coperating parts. Figs. 4 and 5 show details of the roller end of the beam. i

a is the main shaft of the machine, which may be driven from shafting or by an elec- On a breakdown-such tric or other motor direct-coupled, if desired.

0n the shaft a is mounted the eccentric 5,

which in rotating bears against the steel roller, mounted in the end Z of the beam or lever d, whereby up-and-down motion is imparted to the latter. As the eccentric?) does not act directly upon the beam end d the great friction at the surface of pressure, which forms an objectionable feature in prior machines of this class, is avoided, for by the insertion of the roller C the friction is reduced to a minimum, being practically limited to a single line, so that much less power is required than is usually the case for machines of the same output.A The roller is mounted in a bearing open below and is retained in position by means of the cheek-plates a. Should a breakdown occurfor instance, jambing of the shear-slide in its lower position-the beam end CZ', remainingin its elevated position, will compress the spring m, but will not cause fracture or disturbance of any machine part. On the beam CZ turning on its fulcrum B the bell-crank lever 0, loaded with the counterweight 0', is caused to take up the position shown in Figs. l and 3 and will butt against the casing p, rigidly secured by means of a screw-pin p' to the dog or block and containing a spring coiled round the. said pin p. The spring will thus be compressed and the dog 7c forced between the beam end (Z2 and the press-block Z. The latter is of substantially semispherical form in order that it may adapt itself to the position of the beam d bearing upon it, which beam, owing to its motion about the fulcrum B, does not descend in a strictly-vertical path upon the block Z. motion of the beam Z will thus be directly transmitted to the shear-slide r or punch-piston r', which, according to the stroke of the beam, will descend upon the work and effect shearing or punching, as the case may be. On the upward stroke of the beam end Z2 the highest position of the slide r and piston r is regulated by means of the stop If at any time thepart fr or r' is to be brought out of action, the bell-crank lever o must be turned into the broken-line position, Fig. 1. By reason of the counter-pressure of the spiral spring the dog then snaps back, so that on de- Thed IOO

scent of the end Z2 again there is no pressure exerted by Z2 on Z, owing to the g'ap between them. Since the spring' m' expands on the downward non-working stroke of the beam end cl2, the part r or fr is always maintained in the highest position. Thus material to be sheared or punched can be introduced into the machine without any inconvenience.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In a shearing' and punching` machine, a rocking beam, an eccentric-shaft, an, eccentric on said shaft cooperating with one beam end, a sliiring-actuated device connecting said beam end and eccentric, a tool-slide at the opposite beam end, a spring-actuated device connecting' the latter and the slide, a sliding, spring-controlled dog secured to the second said beam end, and means for forcing the said dog between the beam end and the slide, substantially as described.

2. In a shearing and punching machine, a rocking beam, an eccentric-shaft, an eccentric on said shaft cooperating-with one beam end, a spring-actu ated device connecting1 said beam end and eccentric, a tool-slide at the opposite beam end, a spring-actuated device connecting the latter and the slide, a sliding, springcontrolled dog secured to the second said beam end, and a counterweighted bell-crank lever pivoted to the last said beam end and forcing said dog between the latter and the slide, substantially as described.

3. In a shearing and punching machine, a rocking beam, a friction-roller mounted at one end, an eccentric-shaft, an eccentric on said shaft coperating with said roller, a springactuated device connecting said beam end and eccentric, a tool-slide at the opposite beam end, a spring-actuated device connecting the latter and the slide, a semispherical pressblock located at the top of the slide, a sliding, spring-controlled dog secured to the second said beam end, and a counterweighted bellcrank lever pivoted to the last said beam end and forcing the said dog between the latter and the slide press-block, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

CARL WUNDERLICI-I Vitn esses:

W. SPIELMEYER, OsKAR BoNisoH. 

